java.lang.reflect.Constructor.getGenericExceptionTypes() Method Example


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Description

The java.lang.reflect.Constructor.getGenericExceptionTypes() method returns an array of Type objects that represent the exceptions declared to be thrown by this Constructor object. Returns an array of length 0 if the underlying method declares no exceptions in its throws clause.

Declaration

Following is the declaration for java.lang.reflect.Constructor.getGenericExceptionTypes() method.

public Type[] getGenericExceptionTypes()

Returns

an array of Types that represent the exception types thrown by the underlying method.

Exceptions

  • GenericSignatureFormatError − if the generic method signature does not conform to the format specified in The Java Virtual Machine Specification.

  • TypeNotPresentException − if the underlying method's throws clause refers to a non-existent type declaration.

  • MalformedParameterizedTypeException − if the underlying method's throws clause refers to a parameterized type that cannot be instantiated for any reason.

Example

The following example shows the usage of java.lang.reflect.Constructor.getGenericExceptionTypes() method.

Live Demo
package com.tutorialspoint;

import java.lang.reflect.Constructor;
import java.lang.reflect.Type;

public class ConstructorDemo {

   public static void main(String[] args) {

      Constructor[] constructors = SampleClass.class.getConstructors();
      Type[] exceptions = constructors[0].getGenericExceptionTypes();
      for (int i = 0; i < exceptions.length; i++) {
         System.out.println(exceptions[i]);
      }
   }
}

class SampleClass {
   private String sampleField;

   public SampleClass() throws ArrayIndexOutOfBoundsException {
   }

   public SampleClass(String sampleField){
      this.sampleField = sampleField;
   }

   public String getSampleField() {
      return sampleField;
   }

   public void setSampleField(String sampleField) {
      this.sampleField = sampleField; 
   } 
}

Let us compile and run the above program, this will produce the following result −

class java.lang.ArrayIndexOutOfBoundsException

java_reflect_constructor.htm

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